Cardiac Na+ channels as therapeutic targets for antiarrhythmic agents.

Abstract excerpt

There are many factors that influence drug block of voltage-gated Na+ channels (VGSC). Pharmacological agents vary in conformation, charge, and affinity. Different drugs have variable affinities to VGSC isoforms, and drug efficacy is affected by implicit tissue properties such as resting potential, action potential morphology, and action potential frequency. The presence of polymorphisms and mutations in the drug...

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